The Real (and Virtual) Adventures of Nathan the IT Guy

What happens when you cannot connect to the service console anymore, and even if you had a backup service console and it wasn’t working either, well i happened to me. When I attempted to attach a vmnic to a vSwitch, I got an error message, no matter what I tried I could not get it reconnected. Last ditch effort is to recreate the vswif interface. Below are the steps I took. I had to do the first 4 steps twice, as i had to vSwitches.

Note: On your system the vswif, vmnic, vSwitch numbers and network settings are different.

1.Run the following command to list the name of the vswif adapter:

esxcfg-vswif -l

2.Run the following command to delete the vswif adapter:

esxcfg-vswif –del vswif0

3.Run the following command to list the name of the vSwitch:

esxcfg-vswitch -l

4.Run the following command to delete the vSwitch:

esxcfg-vswitch -d vSwitch0

5.Run the following command to create the vSwitch:

esxcfg-vswitch -a vSwitch0

6.Run the following commands to create default port groups for vSwitch:

9.Run the following commands to list all of the network adapters and associate a vmnic which has a link status of up:

esxcfg-nics -l
esxcfg-vswitch -L vmnic1 vSwitch0

10.Run the following command to verify that the vmnic is associated with the vSwitch:

esxcfg-vswitch -l

11.Ping an IP address to check for network connectivity. If the ping fails remove the previous vmnic from the vSwitch and try another adapter that has a link status of up.

12.Once you have verified connectivity, you can then connect to Virtual Infrastructure client of the affected ESX Server, you may or may not have a bit a work ahead of you at this point, depending on iSCSI, etc…

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About This Blog

Nathan is a Senior Technical Architect and he’ll be blogging about virtualization, portable apps, useful little-known apps and general IT issues and resolutions encountered in his role as an IT consultant. He’ll also be blogging about his certification exam experiences with the MCTS track. Currently he has VCP3,4, 5, VTSP4/5, VMware VDI Accredidation, and MCP Certifications.